Difference in Tablespace Size Values From dba_data_files and dba_tablespace_usage_metrics/V$Filespace_usage
(Doc ID 455715.1)
Last updated on FEBRUARY 02, 2022
Applies to:Oracle Database - Enterprise Edition - Version 10.1.0.2 to 220.127.116.11 [Release 10.1 to 12.1]
Oracle Database Cloud Schema Service - Version N/A and later
Oracle Database Exadata Express Cloud Service - Version N/A and later
Oracle Database Exadata Cloud Machine - Version N/A and later
Oracle Cloud Infrastructure - Database Service - Version N/A and later
Information in this document applies to any platform.
Tablespace size values differ when checked from DBA_DATA_FILES and DBA_TABLESPACE_USAGE_METRICS /V$FILESPACE_USAGE
The example shows data for a tablespace with a 16k block size.
In this case, there is a 3.9GB difference in the values reported from both views.
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